Decibil range created by a 3000 hp recip. engine at idle speed?

Question:
hearing has been impaired need to know at what decibil range these engines are capable of creating at idle and at full throttle

Answers:

Helicopter hours??? SOMEONE WHO KNOWS HELICOPTERS?

125 - 160 db depending on some slight variables... altitude (obviously the higher elevation, less air density... thus less noise) and where in relation to the engine to take a reading (doppler effect) Either way it is very damaging to the human ear proper protection should be carried out.

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